The speech was uttered with an odd abruptness and didacticism which made Aaron open his eyes. Angus had that peculiar manner: he seemed to be haranguing himself in the circle of his own thoughts, not addressing himself to his listener.

So his listener listened on the outside edge of the young fellow’s crowded thoughts. Francis put on a distressed air, and let his attention wander. Angus pursed his lips and his eyes were stretched wide with a kind of pleasure, like a wicked owl which has just joyfully hooted an ill omen.

“Tell me,” said Francis to Aaron. “Where were YOU all the time during the war?”

“I was doing my job,” said Aaron. Which led to his explaining his origins.

“Really! So your music is quite new! But how interesting!” cried Francis.

Aaron explained further.

“And so the war hardly affected you? But what did you FEEL about it, privately?”

“I didn’t feel much. I didn’t know what to feel. Other folks did such a lot of feeling, I thought I’d better keep my mouth shut.”

“Yes, quite!” said Angus. “Everybody had such a lot of feelings on somebody else’s behalf, that nobody ever had time to realise what they felt themselves. I know I I was like that. The feelings all came on to me from the outside: like flies settling on meat. Before I knew where I was I was eaten up with a swarm of feelings, and I found myself in the trenches. God knows what for. And ever since then I’ve been trying to get out of my swarm of feelings, which buzz in and out of me and have nothing to do with me. I realised it in hospital. It’s exactly like trying to get out of a swarm of nasty dirty flies. And every one you kill makes you sick, but doesn’t make the swarm any less.”

Again Angus pursed and bridled and looked like a pleased, wicked white owl. Then he polished his monocle on a very choice silk handkerchief, and fixed it unseeing in his left eye.

But Francis was not interested in his friend’s experiences. For Francis had had a job in the War Office—whereas Angus was a war–hero with shattered nerves. And let him depreciate his own experiences as much as he liked, the young man with the monocle kept tight hold on his prestige as a war hero. Only for himself, though. He by no means insisted that anyone else should be war–bitten.

Francis was one of those men who, like women, can set up the sympathetic flow and make a fellow give himself away without realising what he is doing. So there sat our friend Aaron, amusingly unbosoming himself of all his history and experiences, drawn out by the arch, subtle attentiveness of the handsome Francis. Angus listened, too, with pleased amusedness on his pale, emaciated face, pursing his shrunken jaw. And Aaron sipped various glasses of the liqueur, and told all his tale as if it was a comedy. A comedy it seemed, too, at that hour. And a comedy no doubt it was. But mixed, like most things in this life. Mixed.

It was about ten minutes before we regained our cab and drove back into Ross, Holmes still carrying with him the stone which he had picked up in the wood.

“This may interest you, Lestrade,” he remarked, holding it out. “The murder was done with it.”

“I see no marks.”

“There are none.”

“How do you know, then?”

“The grass was growing under it. It had only lain there a few days. There was no sign of a place whence it had been taken. It corresponds with the injuries. There is no sign of any other weapon.”

“And the murderer?”

“Is a tall man, left-handed, limps with the right leg, wears thick-soled shooting-boots and a gray cloak, smokes Indian cigars, uses a cigar-holder, and carries a blunt pen-knife in his pocket. There are several other indications, but these may be enough to aid us in our search.”

Lestrade laughed. “I am afraid that I am still a sceptic,” he said. “Theories are all very well, but we have to deal with a hard-headed British jury.”

“Nous verrons,” answered Holmes calmly. “You work your own method, and I shall work mine. I shall be busy this afternoon, and shall probably return to London by the evening train.”

“And leave your case unfinished?”

“No, finished.”

“But the mystery?”

“It is solved.’

“Who was the criminal, then?”

“The gentleman I describe.”

“But who is he?”

“Surely it would not be difficult to find out. This is not such a populous neighbourhood.”

Lestrade shrugged his shoulders. “I am a practical man,” he said, “and I really cannot undertake to go about the country looking for a left-handed gentleman with a game-leg. I should become the laughing-stock of Scotland Yard.”

“All right,” said Holmes quietly. “I have given you the chance. Here are your lodgings. Good-bye. I shall drop you a line before I leave.”

Having left Lestrade at his rooms, we drove to our hotel, where we found lunch upon the table. Holmes was silent and buried in thought with a pained expression upon his face, as one who finds himself in a perplexing position.

“Look here, Watson,” he said when the cloth was cleared “just sit down in this chair and let me preach to you for a little, don’t know quite what to do, and I should value your advice. Light a cigar and let me expound.”

“Pray do so.”

“Well, now, in considering this case there are two points about young McCarthy’s narrative which struck us both instantly, although they impressed me in his favour and you against him. One was the fact that his father should, according to his account, cry ‘Cooee!’ before seeing him. The other was his singular dying reference to a rat. He mumbled several words, you understand, but that was all that caught the son’s ear. Now from this double point our research must commence, and we will begin it by presuming that what the lad says is absolutely true.”